:root{--ink:#16191f;--muted:#5b6472;--line:#dde2e7;--bg:#fff;--bg-subtle:#f6f8fa;--bg-sunken:#eef1f4;--verified:#1c6b3a;--verified-bg:#e7f5ec;--review:#9a5b00;--review-bg:#fdf1de;--accent:#0f6e5c;--accent-bg:#e4f4f0;--link:#185ea8;--link-bg:#eaf2fa;--radius:.6rem;--shadow:0 1px 2px #14181e0f, 0 4px 14px #14181e0d}*{box-sizing:border-box}body{color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;margin:0;font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.55}h1{letter-spacing:-.01em;margin:0 0 .5rem;font-size:1.7rem}h2{letter-spacing:-.005em;font-size:1.2rem}p{color:var(--ink)}header{border-bottom:1px solid var(--line);backdrop-filter:saturate(1.4)blur(6px);z-index:10;background:#ffffffeb;align-items:baseline;gap:1.5rem;padding:.9rem 1.25rem;display:flex;position:sticky;top:0}header a{color:var(--ink);font-weight:700;text-decoration:none}header nav a{color:var(--muted);margin-right:1.25rem;font-size:.92rem;font-weight:600;text-decoration:none}header nav a:hover{color:var(--link)}main{max-width:68rem;margin:0 auto;padding:2rem 1.25rem 4rem}footer{border-top:1px solid var(--line);color:var(--muted);margin-top:3rem;padding:1.5rem 1.25rem;font-size:.85rem}table{border-collapse:separate;border-spacing:0;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);width:100%;font-size:.9rem;overflow:hidden}th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:.6rem .7rem}th{background:var(--bg-subtle);text-transform:uppercase;letter-spacing:.03em;color:var(--muted);font-size:.78rem;font-weight:700}tbody tr:hover{background:var(--bg-subtle)}tbody tr:last-child td{border-bottom:none}.badge{white-space:nowrap;border-radius:999px;padding:.15rem .55rem;font-size:.76rem;font-weight:700;display:inline-block}.badge.verified{color:var(--verified);background:var(--verified-bg)}.badge.needs_review{color:var(--review);background:var(--review-bg)}.badge.refrigerant-r454b{color:var(--accent);background:var(--accent-bg)}.badge.refrigerant-r32{color:var(--link);background:var(--link-bg)}.badge.refrigerant-r410a{color:var(--muted);background:var(--bg-sunken)}.note{color:var(--muted);margin-top:.2rem;font-size:.83rem}.source-links{margin-top:.25rem;font-size:.82rem}.source-links a{color:var(--link)}.row-details{font-size:.85rem}.row-details>summary{cursor:pointer;color:var(--link);font-size:.82rem;font-weight:600;list-style:none}.row-details>summary::-webkit-details-marker{display:none}.row-details>summary:hover{text-decoration:underline}.row-details[open]>summary{margin-bottom:.4rem}.row-details-hint{color:var(--muted);font-weight:500}.row-details-content{padding-top:.15rem}.callout{background:var(--bg-subtle);border:1px solid var(--line);border-radius:var(--radius);color:var(--muted);margin:0 0 1.5rem;padding:.8rem 1rem;font-size:.9rem}.callout strong{color:var(--ink)}.affiliate-disclosure{background:var(--bg-subtle);border:1px solid var(--line);border-radius:var(--radius);color:var(--muted);margin:0 0 1.5rem;padding:.6rem .9rem;font-size:.85rem}.affiliate-link{color:var(--link)}.path-grid{grid-template-columns:1fr 1fr;gap:1.25rem;margin:1.75rem 0;display:grid}@media (width<=40rem){.path-grid{grid-template-columns:1fr}}.path-card{border:1px solid var(--line);border-radius:var(--radius);color:var(--ink);background:var(--bg);box-shadow:var(--shadow);padding:1.4rem;text-decoration:none;transition:transform .12s,border-color .12s;display:block}.path-card:hover{border-color:var(--link);transform:translateY(-1px)}.path-card h2{margin:0 0 .4rem;font-size:1.15rem}.path-card p{color:var(--muted);margin:0;font-size:.92rem}.path-card .path-cta{color:var(--link);margin-top:.7rem;font-size:.88rem;font-weight:700;display:inline-block}.cta-box{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--accent-bg);border-radius:var(--radius);margin:2rem 0;padding:1.1rem 1.3rem}.cta-box p{margin:0 0 .7rem}.cta-box a.button{background:var(--accent);color:#fff;border-radius:.4rem;padding:.55rem 1.1rem;font-size:.9rem;font-weight:700;text-decoration:none;display:inline-block}.cta-box a.button:hover{opacity:.92}.search-shell{max-width:32rem;position:relative}.search-shell svg{color:var(--muted);pointer-events:none;position:absolute;top:50%;left:.75rem;transform:translateY(-50%)}.table-search{border:1px solid var(--line);border-radius:var(--radius);width:100%;font:inherit;padding:.65rem .8rem .65rem 2.3rem;font-size:1rem}.table-search:focus{border-color:var(--link);box-shadow:0 0 0 3px var(--link-bg);outline:none}.tabs{background:var(--bg-sunken);border-radius:999px;gap:.25rem;margin-bottom:1.25rem;padding:.25rem;display:inline-flex}.tab-button{font:inherit;color:var(--muted);cursor:pointer;background:0 0;border:none;border-radius:999px;padding:.45rem 1.1rem;font-size:.88rem;font-weight:600}.tab-button[aria-selected=true]{background:var(--bg);color:var(--ink);box-shadow:var(--shadow)}.tab-panel[hidden]{display:none}.chip-row{flex-wrap:wrap;gap:.5rem;margin:.25rem 0 1.25rem;display:flex}.chip{border:1px solid var(--line);background:var(--bg);font:inherit;color:var(--ink);cursor:pointer;border-radius:999px;padding:.4rem .9rem;font-size:.85rem;font-weight:600}.chip:hover{border-color:var(--link)}.chip[aria-pressed=true]{background:var(--link-bg);border-color:var(--link);color:var(--link)}.model-list{flex-wrap:wrap;gap:.5rem;margin:0 0 1.5rem;display:flex}.model-chip{border:1px solid var(--line);background:var(--bg);color:var(--ink);font:inherit;cursor:pointer;border-radius:.4rem;padding:.35rem .7rem;font-family:ui-monospace,SF Mono,Consolas,monospace;font-size:.83rem;text-decoration:none;display:inline-block}.model-chip:hover{border-color:var(--link);color:var(--link)}.model-chip[aria-pressed=true]{background:var(--link-bg);border-color:var(--link);color:var(--link)}.brand-badge{color:#fff;vertical-align:middle;border-radius:50%;flex:none;justify-content:center;align-items:center;width:1.5rem;height:1.5rem;margin-right:.45rem;font-size:.68rem;font-weight:800;display:inline-flex}.brand-badge.goodman{background:#4f46e5}.brand-badge.daikin{background:#e11d48}.brand-badge.lennox{background:#b45309}.brand-badge.default-brand{background:#64748b}.brand-cell{align-items:center;display:inline-flex}.glossary{border:1px solid var(--line);border-radius:var(--radius);background:var(--bg);margin:0 0 1.5rem;padding:1.1rem 1.3rem}.glossary h2{margin:0 0 .75rem;font-size:1.02rem}.glossary dl{grid-template-columns:max-content 1fr;gap:.45rem 1rem;margin:0;display:grid}@media (width<=36rem){.glossary dl{grid-template-columns:1fr}.glossary dt{margin-top:.5rem}}.glossary dt{color:var(--ink);white-space:nowrap;font-size:.85rem;font-weight:700}.glossary dd{color:var(--muted);margin:0;font-size:.87rem}